Ktm Sx 125 vs Aprilia Rx 125 — which has more power?

Ktm Sx 125 produces ~34 hp @ 11,500 rpm (estimated for modern 2020+ era models); Aprilia Rx 125 produces ~15 hp @ 9,000 rpm — Note: 2018+ four-stroke Euro4 model; two-stroke variants produced slightly less restricted power. Ktm Sx 125 wins by 19 hp.

Ktm Sx 125 vs Aprilia Rx 125 — which is faster?

Top speed: Ktm Sx 125 ~110 km/h (estimated; top speed varies significantly based on gearing and track conditions), Aprilia Rx 125 ~100 km/h — Note: estimate; varies between two-stroke and four-stroke generations. Ktm Sx 125 is the faster of the two.

Ktm Sx 125 vs Aprilia Rx 125 — which is lighter?

Weight: Ktm Sx 125 ~98 kg (wet/curb weight, based on 2020+ models), Aprilia Rx 125 ~107 kg (wet/curb weight) — Note: approximate for the modern four-stroke generation. Ktm Sx 125 is lighter by 9 kg.

Ktm Sx 125 vs Aprilia Rx 125 — which is more fuel-efficient?

Fuel use: Ktm Sx 125 Estimated 4–6 L/100km (note: varies greatly depending on riding intensity; two-stroke motocross bikes are not typically measured by standard fuel economy metrics), Aprilia Rx 125 ~3.5 L/100km (est. 28 km/L) — Note: estimate based on typical 125cc four-stroke off-road usage; two-stroke variants may vary. Real-world economy varies by rider weight, traffic, and how hard the throttle gets twisted.

Ktm Sx 125 vs Aprilia Rx 125 — which is more reliable?

Motoryk rates Ktm Sx 125 8.5/10 and Aprilia Rx 125 7.5/10. Ktm Sx 125 scores higher on the overall verdict. Ktm Sx 125 caveat: You're a beginner or hate wrenching. Aprilia Rx 125 caveat: You want cheap, easy maintenance anywhere.

Ktm Sx 125 vs Aprilia Rx 125 — which is better for beginners?

Both are reasonable first-bike candidates. Ktm Sx 125: 34 hp. Aprilia Rx 125: 15 hp.

Ktm Sx 125 vs Aprilia Rx 125 — which should I commute on daily?

Both can commute, but lighter weight and gentler power win in traffic. Ktm Sx 125: 98 kg, 34 hp. Aprilia Rx 125: 107 kg, 15 hp.

Ktm Sx 125 vs Aprilia Rx 125

Side-by-side comparison for used motorcycle buyers

Ktm Sx 125 vs Aprilia Rx 125. Ktm Sx 125: ~34 hp @ 11,500 rpm (estimated for modern 2020+ era models) hp, ~98 kg (wet/curb weight, based on 2020+ models) weight, top speed ~110 km/h (estimated; top speed varies significantly based on gearing and track conditions), Motoryk rating 8.5/10. Aprilia Rx 125: ~15 hp @ 9,000 rpm — Note: 2018+ four-stroke Euro4 model; two-stroke variants produced slightly less restricted power hp, ~107 kg (wet/curb weight) — Note: approximate for the modern four-stroke generation weight, top speed ~100 km/h — Note: estimate; varies between two-stroke and four-stroke generations, Motoryk rating 7.5/10.

Ktm Sx 125

Aprilia Rx 125

Performance at a Glance

Green = winner per metric · Bars are relative to the higher value

Ktm Sx 125 Aprilia Rx 125

Horsepower (hp)

34 hp

15 hp

Torque (Nm)

25 Nm

13 Nm

Top Speed (km/h)

110 km/h

100 km/h

Weight (kg) — lower is better

98 kg

107 kg

Type

Motocross

Enduro

Horsepower

~34 hp @ 11,500 rpm (estimated for modern 2020+ era models)

~15 hp @ 9,000 rpm — Note: 2018+ four-stroke Euro4 model; two-stroke variants produced slightly less restricted power

Torque

~25 Nm @ 10,500 rpm (estimated)

~13 Nm @ 7,500 rpm — Note: estimate for the four-stroke variant

Top Speed

~110 km/h (estimated; top speed varies significantly based on gearing and track conditions)

~100 km/h — Note: estimate; varies between two-stroke and four-stroke generations

Weight

~98 kg (wet/curb weight, based on 2020+ models)

~107 kg (wet/curb weight) — Note: approximate for the modern four-stroke generation

Fuel

Estimated 4–6 L/100km (note: varies greatly depending on riding intensity; two-stroke motocross bikes are not typically measured by standard fuel economy metrics)

~3.5 L/100km (est. 28 km/L) — Note: estimate based on typical 125cc four-stroke off-road usage; two-stroke variants may vary

Fairing